package com.norma.netty.study.netty.simple;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.util.CharsetUtil;

/**
 * @author zhangchaofeng
 * @date 2020/10/3
 * @description netty客户端处理器
 */
public class NettyClientHandler extends ChannelInboundHandlerAdapter {

    //通道就绪
    @Override
    public void channelActive(ChannelHandlerContext ctx) throws Exception {
        System.out.println("client " + ctx);
        ctx.writeAndFlush(Unpooled.copiedBuffer("Hello,server", CharsetUtil.UTF_8));
    }

    //当通道有读取事件时
    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
        ByteBuf byteBuf = (ByteBuf) msg;
        System.out.println("server say: " + byteBuf.toString(CharsetUtil.UTF_8));
        System.out.println("server ip: " + ctx.channel().remoteAddress());
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        ctx.close();
    }
}
